Z for about six months now and I love it. This has been one of the mods that really made my Z move. After the Selin dual intake mod,I use to get the goose horn sound from the intakes with hard acceleration in first gear. Now that I have the South bend Clutch and flywheel I get it in second and third gear too. Do you hear it? it doesn't bother me, because it just tells me that I am pulling in a lot of air.